DOI: 10.1016/j.atmosenv.2016.12.004
Scopus记录号: 2-s2.0-85006307086
论文题名: Seasonal behavior of carbonyls and source characterization of formaldehyde (HCHO) in ambient air
作者: Lui K ; H ; , Ho S ; S ; H ; , Louie P ; K ; K ; , Chan C ; S ; , Lee S ; C ; , Hu D ; , Chan P ; W ; , Lee J ; C ; W ; , Ho K ; F
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 152 起始页码: 51
结束页码: 60
语种: 英语
英文关键词: Ambient air
; Carbonyl
; Correlation analysis
; Seasonal variation
; Source apportionment analysis
Scopus关键词: Acetaldehyde
; Air pollution
; Correlation methods
; Formaldehyde
; Oxidation
; Ozone
; Pollution control
; Reaction intermediates
; Regression analysis
; Rural areas
; Volatile organic compounds
; Ambient air
; Carbonyl
; Correlation analysis
; Seasonal variation
; Source apportionment
; Carbonyl compounds
; acetaldehyde
; carbonyl derivative
; formaldehyde
; volatile organic compound
; ambient air
; carbonyl compound
; correlation
; formaldehyde
; oxidation
; ozone
; photochemistry
; pollution control
; rural area
; seasonal variation
; source apportionment
; traffic emission
; troposphere
; urban area
; volatile organic compound
; ambient air
; Article
; autumn
; concentration (parameters)
; correlation analysis
; environmental policy
; gas
; Hong Kong
; low temperature
; meteorology
; photooxidation
; pollution control
; priority journal
; seasonal variation
; source apportionment analysis
; spring
; summer
; winter
; China
; Hong Kong
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Gas-phase formaldehyde (HCHO) is an intermediate and a sensitive indicator for volatile organic compounds (VOCs) oxidation, which drives tropospheric ozone production. Effective photochemical pollution control strategies demand a thorough understanding of photochemical oxidation precursors, making differentiation between sources of primary and secondary generated HCHO inevitable. Spatial and seasonal variations of airborne carbonyls based on two years of measurements (2012–2013), coupled with a correlation-based HCHO source apportionment analysis, were determined for three sampling locations in Hong Kong (denoted HT, TC, and YL). Formaldehyde and acetaldehyde were the two most abundant compounds of the total quantified carbonyls. Pearson's correlation analysis (r > 0.7) implies that formaldehyde and acetaldehyde possibly share similar sources. The total carbonyl concentration trends (HT < TC < YL) reflect location characteristics (urban > rural). A regression analysis further quantifies the relative primary HCHO source contributions at HT (∼13%), TC (∼21%), and YL (∼40%), showing more direct vehicular emissions in urban than rural areas. Relative secondary source contributions at YL (∼36%) and TC (∼31%) resemble each other, implying similar urban source contributions. Relative background source contributions at TC could be due to a closed structure microenvironment that favors the trapping of HCHO. Comparable seasonal differences are observed at all stations. The results of this study will aid in the development of a new regional ozone (O3) control policy, as ambient HCHO can enhance O3 production and also be produced from atmospheric VOCs oxidation (secondary HCHO). © 2016 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82214
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, China; Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; Division of Atmospheric Sciences, Desert Research Institute, Reno, United States; Hong Kong Environmental Protection Department, 33/F., Revenue Tower, 5 Gloucester Road, Wan Chai, Hong Kong; Department of Civil and Structural Engineering, Research Center of Urban Environmental Technology and Management, The Hong Kong Polytechnic University, China; Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, China; Hong Kong Observatory, 134A Nathan Road, Kowloon, Hong Kong
Recommended Citation:
Lui K,H,, Ho S,et al. Seasonal behavior of carbonyls and source characterization of formaldehyde (HCHO) in ambient air[J]. Atmospheric Environment,2017-01-01,152